tolong bantuannya pakai cara ya,please,ditunggu segera??

Luas = 16/π cm²
πr² = 16/π
r² = 16/π²
r = 4/π

Keliling :
= 2πr
= 2. π . 4/π
= 2. 4
= 8

Jadi keliling lingkaran = 8 cm

Bab Lingkaran
Matematika SMP Kelas VII

luas lingkaran = π x r² = 16 / π
r² = 4²/π²
r = 4/π

keliling = 2 x π x r
keliling = 2 x π x 4/π
keliling = 8 cm

jawabannya C